From which season do you think South Park started to decline in quality compared to earlier seasons?

I'm a huge South Park fan. I've watched almost every episode at least 10 times, and I’ve even listened to each episode like a podcast, with my eyes closed, trying to fall asleep at least 10 times. That is, until Season 16. Starting in Season 16, I began to feel that it had lost its old charm, and by Season 17, it was almost completely gone. Did they change something, or is it just that "I'm getting old"? I don't know. It feels like the kids lost all their childhood innocence and started becoming more like adults than actual adults. The attempts at satirizing popular culture—something I didn't notice (if it was even there) in earlier seasons—started to irritate me. Of course, there are still good episodes here and there, but only one or two per season. The last episodes I watched were the COVID specials, and I haven't checked out any since. What do you think about this? Am I missing out by not watching the later seasons?